Socket-key clamp.



SOCKET KEY CLAMP. APPLIUA'I'IOH FILED JUNE 6, 1906.

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New Jersejghave invented certain new and I an electric socket, known in the arts incandescent lanipkey socket, after whenever the key too delicateto .stroy the socket. tron this shortcoming is obviated lor alluse of this] clamp prevents not only the deof substituting a kevless for it key socket] nently in position, while said clan'ip is at cc tion, not limitedto these details.

tion of an electric view of the clamp show UNllljllll l nt-1% -llli .L i)

$pecification of Letters Ia'tent.

Patented Jan. '7, 1908.

Application filed June 6,1906. Serial No. 320.440.

To all whom fitmay concern:

"Be it known that I, hlAX Lo minn'rniu, a citizen of the United iltates, and a resident of Newark, in the county of Essex and State of useful Improvements in Soc-kc of which the following is a spe This invention rel ing or holding rigid t-liey Clamps, citication. ates to inc-ans for clainpl in position the key of an it has been turned'tothe on position so as to prevent it from being turned to the otl position, or vice versa. This is found desirable of the lamp socket is required to break more than one aniperent 250 volts or two am )eres at 1'25 volts, the socket being'designed tor a maximum of 250 watts. The internal mechanism of the socket is withstand the breaking of a circuit carrying a heavier load than that mentioned and sparking will ensue. This, it repeated at frequent intervals will soon de--' By means of the invensockets which may be called upon to carry a load of 300, 400, 500 watts, 620., which is the consumption ot a number or domestic electric cooklng and ironing; utensils. The

struction of a key sot set used f or this extraordinary service, but also the resulting shortcircuit within the socket with its attending disastrous results, and obviates the necessity The clamp or stop in its numerous dil ferent forms and means oi a plication is easily attached to any existing lamp socket. The clamp holds the key of a socket perinatached to the socket. i The 'clrawings illustrate a few specific do- 1 signs and forms of construction of the invenl ti'on, which is, however, in its broader con- *igure 1 represents an elevation of an elecl trio socket with the key clamp attached thereto, Fig. 2 shows a plan view of the key l clamp in F ig'. 1, Fig. :3 represents an eleva-- l socket with. another form of the key clamp, Fig. 4 is a plan view of the clamp shown in Fi Vation'of an electric socket and a further modification of the clamp, Figj dis aplan n in Fig. 5, Fig. 7- is project the ears 22,

i ends of the chum p,

3, Fig. 5 shows elean elevation of an electric socket with another modification of the clump, Fig. 8 is a side view of Fig. 7, Fig. 9 shows a plan View of the clamp represented in Figs. 7 and 8, Fig. 10 is a front view of Fig. 9, and Fig. 11 is a frzigmei'itary view of Fig. 10 .with the ends of the clamp disengaged.

The socket is designated by the numeral .20, and around the body thereof is clamped the ring clainp'21', at the open ends of which which are oined by the bolt-23 mirryiiig the nut 24. The cars 22 bear against the sidesof the key 25 of the socket, and prevent the latter being turned when in'place.

In. Figs. and 4 the ring clamp 26 has formed therein the U shaped projection 27 which engageswith the key of the socket, and cars :26 and 2!) project from the open the latter being joined by the thumb screw 30. A boss 31 extends from the car 28, and a thread is formed in both the said boss and car 25%. The threaded end of the screw 30 engages with said thread. i A washer 32 is located between the head of the screw 30 and the car which carries said head.

In F 5 and 6 the socket is shown with a bracket 3, having one of its legs bolted to the body of. the socket by means of the screws slot 35 being generally formed in the leg 33, the other leg 36 of the bracket being, U shaped and encircling the ke x 25 of the socket.

in bios. 7 to Ill the socket has encircling around its body the ring clamp 40, the ends of which linve notches 4] by means of which the said ends may be engaged. A U shaped projection 42 in the ring engages with the key 25 of the socket.

it will be noted that the devices shown and of which tl'iere only be many other modifications, securely and ensily'lock the key ol the socket from breakin g the circuit, and with a slight modification could be used to. prevent establishing an opencircuit.

llaving described my invention I olaimz l. The combination of an electric socket, a detachable 'clainp heldin place ;on the socket and bearing against the key thereof.

2. The combination of an electric socket, on ei'ljustable clamp around the body thereof, it part of the clamp bearing against the key of the socket, and means to tighten the clamp in position.

3. The combination with an electric lamp. 1 action of the key of the socket, to prevent 10 key socket of a ring clamp around the body fully turning-the said key. thereof, ears extending from the clamp and Signed-e1; New York in the county of New bearing againstv thekey of the socket, and a.

5 bolt joining the earsto secure the clamp in June, A. D. 1906. j Y

place, and to prevent thekey being turned. i MAY LOEWENTHAL.

4. The combination of an eiectriosocket, .Witnesses: anedjustable olamperoundthe body thereof -1\'IYRON H. COOK,

and a portion of said clamp in the path of MORRIS LEVY- York and State of New York this 4th day of 

